/Engine/Source/Editor/UnrealEd/Public/Toolkits/AssetEditorToolkit.h
Called when another toolkit (such as a ed mode toolkit) is no longer being hosted in this asset editor toolkit.
virtual void OnToolkitHostingFinished ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IToolkit](API\Editor\EditorFramework\Toolkits\IToolkit) > & Toolkit )